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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_009_012">&nbsp;</a>NAME</h4><blockquote>
strcasecmp, strncasecmp - case-insensitive string comparisons
</blockquote><h4><a name = "tag_000_009_013">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="strings.h.html">strings.h</a>&gt;

int strcasecmp(const char *<i>s1</i>, const char *<i>s2</i>);
int strncasecmp(const char *<i>s1</i>, const char *<i>s2</i>, size_t <i>n</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_009_014">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>strcasecmp()</i>
function compares, while ignoring differences in case,
the string pointed to by <i>s1</i> to the string pointed to by <i>s2</i>.
The
<i><a href="strncasecmp.html">strncasecmp()</a></i>
function compares, while ignoring differences in case, not more than <i>n</i>
bytes from the string pointed to by <i>s1</i> to the string pointed to by
<i>s2</i>.
<p>
In the POSIX locale,
<i>strcasecmp()</i>
and
<i><a href="strncasecmp.html">strncasecmp()</a></i>
do upper to lower conversions, then a byte comparison.  The results are
unspecified in other locales.
</blockquote><h4><a name = "tag_000_009_015">&nbsp;</a>RETURN VALUE</h4><blockquote>
Upon completion,
<i>strcasecmp()</i>
returns an integer greater than, equal to or less than 0, if the
string pointed to by <i>s1</i> is, ignoring case, greater than, equal to or
less than the string pointed to by <i>s2</i> respectively.
<p>
Upon successful completion,
<i><a href="strncasecmp.html">strncasecmp()</a></i>
returns an integer greater than, equal to or less than 0, if the
possibly null-terminated array pointed to by <i>s1</i> is, ignoring case,
greater than, equal to or less than the possibly null-terminated array pointed
to by <i>s2</i> respectively.
</blockquote><h4><a name = "tag_000_009_016">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_009_017">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_009_018">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_009_019">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_009_020">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="strings.h.html">&lt;strings.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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